<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2011-2173</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Hortícolas]]></journal-title>
<abbrev-journal-title><![CDATA[rev.colomb.cienc.hortic.]]></abbrev-journal-title>
<issn>2011-2173</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Colombiana de Ciencias Hotícolas, Universidad Pedagógica y Tecnológica de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2011-21732020000200153</article-id>
<article-id pub-id-type="doi">10.17584/rcch.2020v14i2.10735</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[&#8220;Mal de cintura&#8221; disorder characterization of pineapple MD2 in agroclimatic conditions of flat area of Valle del Cauca, Colombia]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización del &#8220;mal de cintura&#8221; de la piña MD2 en condiciones agroclimáticas de la zona plana del Valle del Cauca, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GÓMEZ]]></surname>
<given-names><![CDATA[YESICAMILA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RÍOS-ROJAS]]></surname>
<given-names><![CDATA[LILIANA]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Sede Palmira Departamento de Ciencias Agropecuarias]]></institution>
<addr-line><![CDATA[Palmira ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria  ]]></institution>
<addr-line><![CDATA[Palmira ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2020</year>
</pub-date>
<volume>14</volume>
<numero>2</numero>
<fpage>153</fpage>
<lpage>167</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S2011-21732020000200153&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S2011-21732020000200153&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S2011-21732020000200153&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In some localities in Colombia a physiological disorder called "Mal de cintura", is present in MD2 pineapple productive farms. It is a deformation of the fruit due to the incomplete development of contiguous flowers that produces a physical damage (external appearance); generating fruit rejection in the market. Factors that trigger this problem are unknown. This research was carried out on two farms in Valle del Cauca, Colombia, soil moisture and ambient temperature conditions were evaluated on the expression of the physiological disorder. In farm 1, vegetative and productive phases of the crop were evaluated. The results indicate that the plants were not in water deficit before, during or after flowering, ruling out this factor on the expression of the physiological disorder. During flowering, maximum temperatures reached 35°C and minimum temperatures 18°C were recorded, giving an alert on this variable due to the presence of the physiological disorder of 96% of the crop. In farm 2, a more detailed monitoring of the temperatures was carried out during the inflorescence development. In this period, maximum temperature inside crop was 58.5°C and the minimum was 15.5°C, symptoms of deformation were present in 78% of the crop. Results were inconclusive about temperature influence on fruit deformation. A chemical analysis of inflorescences tissue with and without expression of the physiological disorder was performed to validate the influence of a nutritional problem. Results indicated that damaged inflorescences had higher copper, zinc and manganese contents than healthy inflorescences.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En algunas localidades productoras de piña MD2 en Colombia, se presenta un desorden fisiológico llamado "Mal de cintura". Es una deformación del fruto debido a la ausencia de flores contiguas que produce daño físico, lo que resulta en el rechazo de la fruta. Los factores que mejoran esta fisiopatología son desconocidos. Esta investigación, realizada en dos fincas en el Valle del Cauca, Colombia, evaluó las condiciones de humedad del suelo y temperatura ambiente en la expresión de la fisiopatología. En la finca 1, se evaluaron las fases vegetativa y productiva del cultivo. Los resultados indican que las plantas no tuvieron déficit de agua antes, durante y después de la floración, descartando este factor en la expresión de la fisiopatología. Durante la floración, se registraron temperaturas máximas de 35°C y temperaturas mínimas de 18°C, dando una alerta sobre esta variable debido a la presencia del trastorno fisiológico del 96% del cultivo. En la finca 2, se realizó un monitoreo más detallado de la temperatura durante la formación de la inflorescencia. En este período, la temperatura máxima dentro del cultivo fue de 58,5°C y la mínima de 15,5°C, observando síntomas de deformación en el 78% del cultivo. No fue posible concluir acerca de la influencia de la temperatura sobre la deformación de la fruta. Se realizó un análisis químico del tejido de inflorescencias con y sin expresión de la fisiopatía para validar la influencia de un problema nutricional. Los resultados indican que las inflorescencias con el trastorno fisiológico tienen un mayor contenido de cobre, zinc y manganeso que las inflorescencias sin el trastorno.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ananas comosus L. Merr.]]></kwd>
<kwd lng="en"><![CDATA[physiological disorder]]></kwd>
<kwd lng="en"><![CDATA[flowering]]></kwd>
<kwd lng="en"><![CDATA[soil moisture]]></kwd>
<kwd lng="en"><![CDATA[nutrition]]></kwd>
<kwd lng="en"><![CDATA[temperature]]></kwd>
<kwd lng="es"><![CDATA[Ananas comosus L. Merr.]]></kwd>
<kwd lng="es"><![CDATA[fisiopatía]]></kwd>
<kwd lng="es"><![CDATA[floración]]></kwd>
<kwd lng="es"><![CDATA[humedad del suelo]]></kwd>
<kwd lng="es"><![CDATA[nutrición]]></kwd>
<kwd lng="es"><![CDATA[temperatura]]></kwd>
</kwd-group>
</article-meta>
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